JP5910937B2 - Document conveying apparatus, image reading apparatus, and image forming apparatus - Google Patents

Description

  The present invention relates to a document conveying device that conveys a document, and an image reading apparatus and an image forming apparatus including the document conveying device.

  2. Description of the Related Art Conventionally, an original reading apparatus provided with an original conveying apparatus for conveying originals one by one from a document placing table on which a plurality of originals as sheet materials are placed on top of each other to a reading position for reading an original image by an image reading unit is provided. An image forming apparatus is known.

  The document conveying device described in Patent Document 1 includes a drive shaft that is a rotary shaft member connected to a drive source provided in the apparatus main body, and a rotational driving force is transmitted from the drive source to the drive shaft. It is like that. The driving shaft is provided with a feeding roller holder which is one of rotating members that can rotate with respect to the driving shaft. Inside the feeding roller holder, a feeding roller and a separation belt are arranged. Yes. The feed roller is connected to the drive shaft via a drive transmission member such as a gear or a belt, and is held by the feed roller holder together with the drive transmission member. The separation belt is stretched between a drive roller attached to the drive shaft and a driven roller that rotates along with the surface movement of the separation belt. A pair of guide plates, which are one of rotating members that can rotate with respect to the drive shaft, are attached to both sides in the axial direction across the feeding roller holder of the drive shaft. The guide plate constitutes a part of a document transport path provided with a plurality of transport rollers, and guides a document transported by the transport rollers toward a reading position provided in the apparatus main body. .

  Then, the feeding roller comes into contact with the upper surface of the document on the top of the document stack placed on the document placing table and is driven to rotate, thereby applying a conveying force to the single document. Another document that is to be transported together with the one original document is separated from the one original document by the separation belt, overlapping with the one original document fed by the feeding roller. In this way, the one original from which the other original is separated is conveyed toward the reading position by the conveyance roller while being guided by the guide plate.

  Further, since the rolling-out roller and the separation belt are contaminated and worn with use over time, replacement work and maintenance work are performed. In the document conveying apparatus described in Patent Document 1, the drive shaft is detachable from the apparatus main body. Further, the feeding roller holder can be attached to and detached from the drive shaft integrally with the feeding roller. Thereby, by removing the drive shaft from the apparatus main body and further removing the feed roller holder from the drive shaft, the workability of the feed roller and separation belt replacement work and maintenance work can be greatly improved.

  However, when the drive shaft is mounted on the apparatus main body after the replacement work or the maintenance work, the guide plate may be reversed with respect to the feed roller holder. In this case, the posture of the guide plate is different from the normal posture that can guide the conveyance of the document, and if the drive shaft is attached to the main body in this state, the guide plate is damaged or a conveyance failure occurs. Or

  Further, the rotation member attached to be rotatable with respect to the drive shaft is not limited to the guide plate. For example, as an elevating means for raising and lowering the feeding roller holder so that the feeding roller is brought into contact with and separated from the bundle of documents loaded on the document table, it is attached to the drive shaft so as to be rotatable. There is a case where an elevating member that moves up and down the feeding roller holder in conjunction with each other is used. In this case, if the drive shaft is attached to the main body with the posture of the elevating member remaining different from the normal posture that can raise and lower the feeding roller holder, the elevating member may be damaged or the feeding roller holder may be raised and lowered. The document cannot be fed due to the feeding roller.

  For this reason, when the drive shaft is attached to the apparatus main body, the rotation member such as a guide plate or an elevating member that is rotatably attached to the drive shaft has a posture different from a predetermined posture set in advance. It is necessary to suppress the occurrence of misassembly that is assembled to the main body.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a document conveying device capable of suppressing the occurrence of erroneous assembly of the rotating member rotatably attached to the rotating shaft member to the apparatus body, The present invention also provides an image reading apparatus and an image forming apparatus provided with the document conveying device.

In order to achieve the above object, the invention of claim 1 is based on a document placing table on which a bundle of documents composed of a plurality of documents can be placed, and a rotational driving force that is detachably provided on the apparatus body and transmitted from a driving source. A rotating shaft member that rotates, a feeding member that is attached to the rotating shaft member via a drive transmission member, and that feeds and feeds out the document on the uppermost surface of the document bundle placed on the document table; and the rotating shaft member attached to said separating means for separating the one of the plurality of originals fed out by the feeding member, the mounting et is rotatably to the rotating shaft member, to hold the feed member together with the driving force transmitting member, wherein a holding member detachably attached to the rotation axis member, pivotally attached to the rotating shaft member, the holding said feeding member in conjunction with rotation of itself toward and away from to the original A lifting member for lifting the timber, pivotally mounted on the rotating shaft member, the document feeder and a guide member for guiding the conveyance of the document, the orientation of the elevation member, the posture of the holding member Elevating member attitude regulating means for regulating the attitude of the guide member to a predetermined attitude set in advance with reference to the position of the guide member, and the guide member attitude for regulating the attitude of the guide member to a predetermined attitude set in advance based on the attitude of the holding member And a restricting means .

In the present invention, the rotary shaft member removed from the apparatus main body in order to carry out such replacement or maintenance work, the posture of the that is attached to the rotating shaft member is a pivoting member elevating member and the guide member, the holding The elevating member attitude regulating means and the guide member attitude regulating means are regulated so as to take a predetermined attitude set in advance based on the attitude of the member. Thereby, the rotating shaft member can be attached to the apparatus main body in a state where the elevating member and the guide member are in the predetermined posture. Therefore, it is possible to suppress an erroneous assembly in which the elevating member and the guide member, which are the rotating members, are assembled to the apparatus main body in a posture different from the predetermined posture.

  As mentioned above, according to this invention, there exists an outstanding effect that it can suppress that the misassembly to the apparatus main body of the rotation member attached to the rotating shaft member so that rotation is possible.

The figure which shows the state which the attachment of the feeding roller holder and the raising / lowering member to the drive shaft was completed. 1 is a schematic configuration diagram showing a copying machine. FIG. 3 is a partial configuration diagram illustrating an enlarged part of an internal configuration of an image forming unit. The elements on larger scale which show a part of tandem part. FIG. 2 is a schematic configuration diagram of an image reading unit. The principal part block diagram of a paper feed / separation system. The upper side perspective view of a guide plate, a feeding roller holder having a feeding roller, a separation belt, a drive shaft, and the like. The lower perspective view of a guide plate, a feeding roller holder having a feeding roller, a separation belt, a drive shaft, and the like. The exploded view of a guide plate, a feeding roller holder having a feeding roller, a separation belt, a drive shaft, and the like. The side view of a belt holder. The perspective view which shows the state which extended | stretched the roller holder from the drive shaft and removed. The block diagram of a feeding roller and a drive transmission member. The figure which shows the state by which the isolation | separation rotary body was attached to the drive shaft. The figure which showed the state in the middle of attaching a feeding roller holder and a raising / lowering member to a drive shaft. The figure which showed the state in the middle of attaching a feeding roller holder and a raising / lowering member to a drive shaft. The figure which shows the relationship between a fitting part and a protrusion part in the state in which the raising / lowering member and the feeding roller holder were attached to the drive shaft. The schematic diagram which shows the relationship between a fitting part and a protrusion in the state which inclined the feeding roller holder at the time of attachment / detachment of the feeding roller holder with respect to a drive shaft. The figure which shows the state which the guide plate is a normal attitude | position based on the attitude | position of a feeding roller holder. The figure which shows the state which got over the projection part provided in the guide plate by the deformation | transformation of an axial direction movement control member, and the axial direction movement control member was mounted | worn. The figure which shows the state which provided the projection part which has a magnitude | size of the grade which cannot get over even if an axial direction movement control member deform | transforms. The figure which looked at the state by which the twist of the axial direction movement control member was controlled by the protrusion part protruded from the side surface of the feeding roller holder from diagonally upward of the feeding roller holder. The figure which looked at the state by which the twist of the axial direction movement control member was controlled by the protrusion part projected and provided from the side surface of the feeding roller holder from the side surface of the feeding roller holder. The figure which looked at the state by which the twist of the axial direction movement control member was controlled by the protrusion part projected and provided from the side surface of the feeding roller holder from the back side of the feeding roller holder.

  Hereinafter, an embodiment in which the present invention is applied to an electrophotographic copying machine (hereinafter simply referred to as a copying machine 500) will be described.

First, a basic configuration of the copier 500 according to the present embodiment will be described.
FIG. 2 is a schematic configuration diagram showing the copying machine 500. The copying machine 500 includes an image forming unit 100 as an image forming unit, a paper feeding device 140, and an image reading unit 50 as an image reading device.

  The image reading unit 50 includes a scanner 150 fixed above the image forming unit 100 and an automatic document conveying device (hereinafter referred to as ADF) 51 as a sheet conveying device supported by the scanner 150.

  The paper feeding device 140 includes two paper feeding cassettes 142 arranged in multiple stages in the paper bank 141, a feeding roller 143 that feeds the transfer paper P as a recording medium from the paper feeding cassette 142, and the fed transfer paper. A separation roller 145 that separates P and supplies it to the paper feed path 144 is provided. A plurality of transport rollers 146 that transport the transfer paper P to the image forming unit 100 main body side transfer paper feed path 137 are provided in the paper feed path 144. Then, the transfer paper P in the paper feed cassette 142 is sent out by the feed roller 143, separated by the separation roller 145, supplied to the paper feed path 144, and transported through the paper feed path 144 by the transport roller 146, and the main body side transfer paper. The paper is fed into the paper feed path 137.

  The image forming unit 100 includes an optical writing device 200, four process units 70K, 70Y, 70M, and 70C that form black (K), yellow (Y), magenta (M), and cyan (C) toner images. A transfer unit 124, a paper transport unit 128, a registration roller pair 133, a fixing device 134, a transfer paper reversing device 136, and a main body side transfer paper feed path 137 are provided. Then, a light source such as a laser diode or an LED (not shown) disposed in the optical writing device 200 is driven, and drum-shaped photoconductors 74K, 74Y, and 70C provided in the respective process units 70K, 70Y, 70M, and 70C. The writing light L is irradiated toward 74M and 74C. By this irradiation, latent images are formed on the surfaces of the photoreceptors 74K, 74Y, 74M, and 74C, and the latent images are developed into toner images through a predetermined development process.

  FIG. 3 is a partial configuration diagram illustrating an enlarged part of the internal configuration of the image forming unit 100. FIG. 4 is a partially enlarged view showing a part of a tandem part having four process units 70K, 70Y, 70M, and 70C. Since the process units 70K, 70Y, 70M, and 70C have substantially the same configuration except that the colors of the toners to be used are different, the subscripts K, Y, M, and C attached to the respective reference numerals are omitted in FIG. doing.

  The process unit 70 includes a photosensitive member 74 and a charging device 75, a developing device 80, a drum cleaning device 90, a static elimination lamp 22 and the like disposed around the photosensitive member 74. These are supported as a single unit on a common support and are detachable from the image forming unit 100. The copying machine 500 has a so-called tandem type configuration in which process units 70K, 70Y, 70M, and 70C are arranged so as to face an intermediate transfer belt 125, which will be described later, along the endless movement direction.

  As the photosensitive member 74, a drum-shaped member is used in which a photosensitive layer is formed by applying an organic photosensitive material having photosensitivity to an element tube such as aluminum. An endless belt may be used.

  The developing device 80 develops a latent image formed on the surface of the photoreceptor 74 using a two-component developer (not shown) containing a magnetic carrier and a nonmagnetic toner (hereinafter simply referred to as a developer). ing. In the developing device 80, the developer contained in the developing case 87 is conveyed while being stirred and supplied to the developing sleeve 82, and the toner in the developer carried on the developing sleeve 82 is photosensitive. A developing unit 81 for transferring to the body 74 is provided.

  The stirring unit 85 is provided at a position lower than the developing unit 81, and includes two conveying screws 86 arranged in parallel to each other, a partition plate provided between the two conveying screws 86, and the developing case 87. A toner density sensor 88 provided on the bottom surface is provided.

  The developing unit 81 is rotatably provided at the opening of the developing case 87 so as to face the photosensitive member 74, and has a developing sleeve 82 that carries a developer on the surface thereof, and a magnet roller 83 that is provided in the developing sleeve 82 so as not to rotate. And a doctor blade 84 for regulating the amount of the developer carried on the developing sleeve 82, the tip of which is provided close to the surface of the developing sleeve 82. The developing sleeve 82 has a non-magnetic rotatable cylindrical shape. The magnet roller 83 has a plurality of magnetic poles that are sequentially arranged from the position facing the doctor blade 84 toward the rotation direction of the developing sleeve 82. Each of these magnetic poles applies a magnetic force to the developer on the developing sleeve 82 at a predetermined position in the rotational direction. As a result, the developer sent from the stirring unit 85 is attracted and carried on the surface of the developing sleeve 82 and a magnetic brush is formed on the surface of the developing sleeve 82 along the lines of magnetic force.

  The magnetic brush is regulated to an appropriate layer thickness when passing through the position facing the doctor blade 84 as the developing sleeve 82 rotates, and then conveyed to the developing region facing the photoreceptor 74. The toner is transferred from the developing sleeve 82 side to the latent image on the photosensitive member 74 by the potential difference between the developing bias applied to the developing sleeve 82 and the latent image on the photosensitive member 74, so that the latent image on the photosensitive member 74 is formed. Developed. The developer on the developing sleeve 82 that has passed through the developing area without contributing to development in the developing area returns to the developing portion 81 again with the rotation of the developing sleeve 82 and is repelled between the magnetic poles of the magnet roller 83. After being detached from the surface of the developing sleeve 82 due to the influence of the magnetic field, it is returned into the stirring portion 85. An appropriate amount of toner is replenished in the stirring unit 85 based on the detection result of the toner density sensor 88. As the developing device 80, a device using a one-component developer not containing a magnetic carrier may be adopted instead of a device using a two-component developer.

  As the drum cleaning device 90, a system that presses the cleaning blade 91 made of an elastic body against the photoconductor 74 is used, but another system may be used. Further, in the present embodiment, for the purpose of improving the cleaning property, a method of having a contact conductive fur brush 92 whose outer peripheral surface is in contact with the photoconductor 74 is rotatable in the counterclockwise direction in the drawing is also adopted. Yes. The fur brush 92 also serves to apply the lubricant to the surface of the photosensitive member 74 while scraping the lubricant from a solid lubricant (not shown) into a fine powder.

  Further, a metal electric field roller 93 for applying a bias to the fur brush 92 is rotatably provided in the counterclockwise direction in the figure, and the tip of the scraper 94 is pressed against this. The toner attached to the fur brush 92 is transferred to the electric field roller 93 to which a bias is applied while rotating in contact with the fur brush 92 in the counter direction. The toner transferred to the electric field roller 93 is scraped off from the electric field roller 93 by the scraper 94 and then falls onto the recovery screw 95. The collection screw 95 conveys the collected toner toward the end of the drum cleaning device 90 in the direction perpendicular to the drawing surface, and delivers it to the external recycled toner conveyance device 96. The recycled toner conveying device 96 sends the toner delivered from the collection screw 95 to the developing device 80 for recycling.

  The neutralization lamp 22 neutralizes the surface of the photoreceptor 74 by light irradiation. The surface of the photoreceptor 74 that has been neutralized is uniformly charged by the charging device 75 and then subjected to optical writing processing by the optical writing device 200. In the copying machine 500, a charging device 75 that rotates a charging roller to which a charging bias is applied while contacting the photoconductor 74 is used. A charger or the like may be used.

  In FIG. 3 described above, K, Y, M, and C toner images are formed on the photosensitive members 74K, 74Y, 74M, and 74C of the process units 70K, 70Y, 70M, and 70C by the processes described above. .

  A transfer unit 124 is disposed below the process units 70K, 70Y, 70M, and 70C. The transfer unit 124 moves the intermediate transfer belt 125 stretched by a plurality of rollers endlessly in the clockwise direction in the drawing while contacting the photoreceptors 74K, 74Y, 74M, and 74C. Thus, primary transfer nips for K, Y, M, and C in which the photoreceptors 74K, 74Y, 74M, and 74C and the intermediate transfer belt 125 are in contact with each other are formed.

  In the vicinity of the primary transfer nips for K, Y, M, and C, the intermediate transfer belt 125 is moved to the photoreceptors 74K, 74Y, 74M, and 74C by primary transfer rollers 126K, 126Y, 126M, and 126C disposed inside the belt loop. It is pushing toward. A primary transfer bias is applied to these primary transfer rollers 126K, 126Y, 126M, and 126C by a power source (not shown). As a result, a primary transfer electric field for electrostatically moving the toner images on the photoreceptors 74K, 74Y, 74M, and 74C toward the intermediate transfer belt 125 is formed in the primary transfer nips for K, Y, M, and C. Yes. In FIG. 3, a toner image is formed at each primary transfer nip on the front surface of the intermediate transfer belt 125 that sequentially passes through the primary transfer nips for K, Y, M, and C along with endless movement in the clockwise direction. Sequentially superimposed and primary transferred. By this primary transfer of superposition, a four-color superposed toner image (hereinafter referred to as a four-color toner image) is formed on the front surface of the intermediate transfer belt 125.

  Below the transfer unit 124, a paper transport unit 128 is provided between the drive roller 130 and the secondary transfer roller 131 so as to run an endless paper transport belt 129 and move endlessly. The intermediate transfer belt 125 and the paper transport belt 129 are sandwiched between the secondary transfer roller 131 and the secondary transfer counter roller 127 of the transfer unit 124. As a result, a secondary transfer nip is formed in which the front surface of the intermediate transfer belt 125 and the front surface of the paper transport belt 129 come into contact with each other. A secondary transfer bias is applied to the secondary transfer roller 131 by a power source (not shown). On the other hand, the secondary transfer counter roller 127 of the transfer unit 124 is grounded. Thereby, a secondary transfer electric field is formed in the secondary transfer nip.

  A registration roller pair 133 is disposed on the right side of the secondary transfer nip in the drawing. A registration roller sensor (not shown) is disposed near the entrance of the registration nip of the registration roller pair 133. The transfer paper P conveyed from the paper supply device 140 toward the registration roller pair 133 is temporarily stopped after a predetermined time when the leading edge of the transfer paper P is detected by a registration roller sensor (not shown). The tip is brought into contact with the resist nip 133. As a result, the posture of the transfer paper P is corrected, and preparations for synchronization with image formation are completed.

  When the leading edge of the transfer paper P hits the registration nip, the registration roller pair 133 resumes roller rotation driving at a timing at which the transfer paper P can be synchronized with the four-color toner image on the intermediate transfer belt 125, Send to the secondary transfer nip. In the secondary transfer nip, the four-color toner images on the intermediate transfer belt 125 are collectively transferred to the transfer paper P due to the influence of the secondary transfer electric field and the nip pressure, and become a full color image combined with the white color of the transfer paper P. The transfer paper P that has passed through the secondary transfer nip is separated from the intermediate transfer belt 125 and is conveyed to the fixing device 134 along with its endless movement while being held on the front surface of the paper conveyance belt 129.

  The transfer residual toner that has not been transferred to the transfer paper P at the secondary transfer nip is attached to the front surface of the intermediate transfer belt 125 that has passed through the secondary transfer nip. This transfer residual toner is scraped off and removed by the belt cleaning device 132 in which the cleaning member contacts the front surface of the intermediate transfer belt 125.

  The transfer paper P conveyed to the fixing device 134 is fixed with a full-color image by pressure or heating in the fixing device 134, and is sent from the fixing device 134 to the paper discharge roller pair 135, and then the paper discharge tray 501 outside the apparatus. Is discharged.

FIG. 5 is a schematic configuration diagram of the image reading unit 50.
In FIG. 5, a slit glass 152 and a contact glass 153 are provided on the upper surface of the scanner 150. An exposure lamp 154 and a mirror 155 are provided below the slit glass 152 and the contact glass 153. The exposure lamp 154 and the mirror 155 are used for reading a document placed on the contact glass 153. 5 moves below the glass 153 in the left-right direction in FIG. 5, and when reading the original on the slit glass 152, it stops below the slit glass 152, and after reading the original surface by the exposure lamp 154, this As is well known, the reflected light is imaged on an imaging element such as a CCD via a mirror 155 and a lens (not shown).

  Further, an ADF 51 is mounted on the upper portion of the scanner 150, and on the lower surface of the ADF 51, a document placed on the contact glass 153 is pressed against the contact glass 153, and the reflection plate 7 serving as a white reference when reading the document. Is provided. The ADF 51 is connected to the scanner 150 via a hinge 8 as shown in FIG.

  A document placing table 9 is provided above the ADF 51, and a document bundle P composed of a plurality of documents is placed on the document placing table 9. The document bundle P placed on the document placement table 9 is fed by a feeding roller 10 that can be brought into contact with or separated from the document bundle P, and then separated by a separation belt 11 and a separation prevention roller (a counterpart member) 12. The separation belt 11 is pressed and contacted with the separation prevention roller 12 at an arbitrary angle θ.

  A stopper member 13 is provided downstream of the feeding roller 10 in the document conveying direction, and the document bundle P placed on the document placing table 9 is stopped by the stopper member 13 and enters the separation belt 11 side. Is prohibited.

  A pressing plate 14 is provided below the feeding roller 10, and the pressing plate 14 is brought into contact with and separated from the feeding roller 10 by a solenoid (not shown). That is, when the copy start switch is pressed, the pressure plate 14 moves from a position separated from the feeding roller 10 indicated by a solid line by a solenoid to a position abutting on the feeding roller 10 indicated by a virtual line, and feeds the document. The roller 10 is pressurized and the document is fed by the feeding roller 10.

  The separation belt 11 is bridged by a driving roller 15 and a driven roller 16, and the driving roller 15 is connected to a feeding roller holder 17 that is a holding member via a driving shaft 15 a. The feeding roller holder 17 is rotatable about the drive shaft 15 a, and the feeding roller 10 is attached to the feeding roller holder 17. For this reason, when the feeding roller holder 17 rotates around the drive shaft 15a, the feeding roller 10 is separated from the document bundle P. Further, when the driven roller 16 is rotated around the drive shaft 15 a in this state, the separation belt 11 is separated from the separation prevention roller 12. The feeding roller holder 17 is connected to the frame of the ADF 51 main body via a drive shaft 15a. Further, a paper feed case 18 is provided on the side of the ADF 51 main body, and the paper feed case 18 is rotatably attached to the ADF 51 main body through a fulcrum 19 formed of a shaft provided in the ADF 51 main body. When the paper is opened, the paper feeding unit is exposed.

  The driven roller 16 is biased by a spring 20, and a constant tension is applied to the separation belt 11 by the spring 20. Further, a one-way clutch 21 is provided between the driving roller 15 and the driving shaft 15a, and the driving roller 15 is rotated clockwise in FIG. Further, the separation prevention roller 12 rotates in the clockwise direction in FIG. 5, and the uppermost original is separated from the original bundle P fed between the separation belt 11 and the separation prevention roller 12. The

  The document separated by the separation belt 11 and the separation prevention roller 12 is reversed along the reversing path 25 by the first conveying roller 23 and the driven roller 24 on the driving side, and is conveyed toward the slit glass 152. ing.

  FIG. 6 is a main part configuration diagram of the paper feed / separation system. FIG. 7 is a perspective view of the guide plates 53 and 54, the feeding roller holder 17 having the feeding roller 10, the separation belt 11, the drive shaft 15 a, and the like viewed from above the feeding roller holder 17. FIG. 8 is a perspective view of the guide rollers 53 and 54, the feeding roller holder 17 having the feeding roller 10, the separation belt 11, the drive shaft 15 a, and the like viewed from the lower side of the feeding roller holder 17. FIG. 9 is an exploded view of the guide plates 53 and 54, the feeding roller holder 17 having the feeding roller 10, the separation belt 11, the drive shaft 15a, and the like.

  Guide plates 53 and 54 are provided between the feeding roller 10 and the reversing path 25, and the guide plates 53 and 54 are rotatably attached to the drive shaft 15a. The guide plates 53 and 54 extend by a predetermined length in the document transport direction, and slide in contact with the width direction of the document bundle fed by the feeding roller 10 to guide the document toward the reverse path 25. The conveyance path is configured, and the guide plates 53 and 54 are in sliding contact with both ends of the document in the width direction of the document, thereby preventing the end of the document width from being lifted.

  The driven roller 24 is attached to a lever 26 that is rotatably attached around the fulcrum 19, and is pressed against the first conveying roller 23 by a spring 27 that presses the lever 26.

  The first conveying roller 23 and the driven roller 24 sandwich the separated document, convey it to the slit glass 152 through the reversing guide 28, and then scoop it up to the discharge path 30 by the reversing discharge guide 29. It has become. A reflective guide plate 31 is provided on the slit glass 152, and this reflective guide plate 31 constitutes a white reference at the time of reading.

  The original conveyed to the paper discharge path 30 is nipped and conveyed by the second conveyance roller 32 and the driven roller 33 on the driving side, and is then nipped by the paper discharge roller 34 and the driven roller 35 on the driving side. The paper is discharged to the outside from the paper discharge path 30, discharged by the discharging brush 36, and then discharged onto the exterior cover 37.

  On the other hand, the reflection plate 7 covering the contact glass 153 is provided on the lower surface of the pressure plate 38, and the pressure plate 38 pressurizes the original placed on the contact glass 153 against the contact glass 153. Yes.

  The pressure plate 38 is rotatably attached to the main frame 40 via a fulcrum 39. The main frame 40 has an end attached to the shaft of the driven roller 35 and is fixed to the ADF 51 main body.

  The main frame 40 has an area that covers the contact glass 153, and an exterior cover 37 is attached to the upper surface of the main frame 40 and constitutes a document discharge table together with the exterior cover 37. The pressure plate 38 is connected to an auxiliary frame 42 via a link 41 (only one of the links 41 is shown in FIG. 5), and the auxiliary frame 42 sandwiches the outer peripheral portion of the main frame 40. It is formed as described above, and is pivotally connected to the main frame 40 via a fulcrum 43.

  The main frame 40 is provided with a magnet 44, which attracts the auxiliary frame 42. The auxiliary frame 42 may be entirely made of metal, or may be made entirely of an elastic member such as plastic and the portion attracted to the magnet 44 may be made of metal. The suction means is not limited to a magnet, and any member may be used as long as the member attracts the auxiliary frame 42 to the main frame 40.

  Further, a guide plate 42a that constitutes a part of the paper discharge path 30 is provided at the distal end portion (left end portion in FIG. 5) of the auxiliary frame 42, and the driven roller 33 is rotatable on the guide plate 42a. Is provided.

  A handle 46 is provided in the auxiliary frame 42 near the guide plate 42a, and the handle 46 can be gripped by the user. The main frame 40 is provided with a stopper 47, which abuts against the base end portion (right end portion in FIG. 5) of the auxiliary frame 42, and the auxiliary frame 42 is counterclockwise about the fulcrum 43. It is prohibited to turn more than a predetermined amount. In FIG. 5, reference numeral 48 denotes a driven roller that is in sliding contact with the separation belt 11.

  On the other hand, as shown in FIG. 11, the guide plates 53 and 54 are rotatably attached to the drive shaft 15a, and the drive shaft 15a is inserted into and removed from the shaft holes 53a and 54a formed at predetermined positions. It is designed to be attached to and detached from the drive shaft 15a.

  The drive roller 15 is attached to the drive shaft 15 a via the one-way clutch 21, and a pair of belt holders 52 are provided at both ends of the drive roller 15. As shown in FIG. 10, the belt holder 52 has notches 52a extending in the direction away from the drive roller 15 from the center, and springs (biasing members) 20 are respectively provided in the notches 52a. It is attached.

  The shaft portion 16a of the driven roller 16 is accommodated in the notch 52a, and the driven roller 16 can be moved close to and away from the drive roller 15 by sliding in the notch 52a. Yes. Further, the spring 20 urges the driven roller 16 in a direction away from the driving roller 15, and the urging of the driven roller 16 in this way applies tension to the separation belt 11.

  Further, by bringing the driven roller 16 close to the drive roller 15 against the biasing force of the spring 20, the tension applied to the separation belt 11 is released and the separation belt 11 can be attached to and detached from the drive shaft 15a. ing. When the separation belt 11 is removed from the drive shaft, the driven roller 16 comes out of the notch 52a and is removed from the belt holder 52. In the present embodiment, the separation belt 11, the drive roller 15, the driven roller 16, and the spring 20 constitute a separation rotating body.

  The feeding roller 10 is rotatably supported by the feeding roller holder 17 and is covered with a feeding roller cover 6 provided on the feeding roller holder 17. As shown in FIGS. 11 and 12, the feeding roller holder 17 is attached to and detached from the drive shaft 15a by engaging / disengaging a notch 17a formed at a predetermined position with respect to the drive shaft 15a. It has become.

  A drive gear 55 is fixed to the drive shaft 15a, and the drive force from the paper feed motor is transmitted to the drive gear via a gear (not shown). The drive gear 55 meshes with a belt gear 57 via an idler gear 56 that is rotatably attached to the feeding roller holder 17, and the belt gear 57 is connected to a belt gear 58 via a belt 59. These belt gears 57 and 58 are rotatably provided in the feeding roller holder 17, and when the driving gear 55 rotates, that is, when the driving shaft 15 a rotates, this rotation is transferred to the feeding roller 10 via the idler gear 56 and the belt 59. It is to be transmitted. In the present embodiment, the idler gear 56, the belt gears 57 and 58, and the belt 59 constitute a driving force transmission member.

  A spring 60 is provided at one end of the drive shaft 15a. The spring 60 is in contact with a cylindrical member 63 slidably provided at one end of the drive shaft 15a. The portion is in contact with a ring 61 locked to the end side of the drive shaft 15a. An engaging member 62 is provided at the other end of the drive shaft 15a, and the engaging member 62 is engaged with an engaging groove formed in the ADF 51 body frame.

  Further, one end portion of the drive shaft 15a is also engaged with an engagement groove formed in the ADF 51 body frame, and the cylindrical member 63 is engaged with the engagement groove of the frame so that the cylindrical member 63 is engaged. When the engagement member 62 is engaged with the engagement groove of the frame after being moved along the drive shaft 15a toward the other end side of the drive shaft 15a against the urging force of the spring 60, the tubular shape is formed by the spring 60. The member 63 is urged toward one end of the drive shaft 15a and supported by the frame.

  Further, after removing the engagement member 62 from the engagement groove of the frame, the ring 61 side is removed from the engagement groove, so that the urging force by the spring 60 is released and the drive shaft 15a is removed from the frame. That is, the drive shaft 15a of this embodiment is detachable from the ADF 51 body.

  When the document bundle P is placed on the document placement table 9 so that the document surface is on the upper surface and the start switch is pressed, the pressure plate 14 presses the document bundle P against the feeding roller 10, whereby the feeding roller 10 causes the document bundle to move. Is conveyed toward the separation belt 11.

  At this time, the feeding roller 10 and the driving roller 15 are rotated because they are transmitted from the sheet feeding motor to the feeding roller 10 via the driving gear 55, the idler gear 56, and the belt 59.

  This original bundle P is conveyed on the slit glass 152 along the reverse path 25 by the first conveying roller 23 and the driven roller 24 after the uppermost original is separated by the separation belt 11 and the separation preventing roller 12. Thereafter, the document surface is read by the slit lamp 152 by the exposure lamp 154, the mirror 155, and the like. The document that has been read is transported on the paper discharge path 30 by the second transport roller 32 and the driven roller 33, and then discharged onto the exterior cover 37 by the paper discharge roller 34 and the driven roller 35.

  On the other hand, when exchanging and maintaining the feeding roller 10, the separation belt 11, and the guide plates 53 and 54 that constitute a part of the separation / feeding system, the drive shaft 15a is opened after the sheet feeding unit case 18 is opened. Remove from the frame of the ADF51 body. At this time, since the feeding roller 10, the separation belt 11, and the guide plates 53 and 54 are integrally attached to the drive shaft 15a and unitized, they are removed together with the drive shaft 15a.

  Here, when exchanging or maintaining the guide plates 53 and 54, the guide plates 53 and 54 are removed from the drive shaft 15a and removed.

  When exchanging or maintaining the feeding roller 10, the notch portion 17a is engaged with the drive shaft 15a, so that the feeding roller holder 17 is pulled in a predetermined direction as shown in FIG. It is easily removed from the drive shaft 15a.

  When the separation belt 11 is replaced or maintained, the follower roller 16 is urged by the spring 20 with the feeding roller holder 17 and the guide plates 53 and 54 removed from the drive shaft 15a as shown in FIG. In contrast, the tension of the separation belt 11 is released by bringing the notch portion 52a closer to the drive roller 15 side. In this state, the separation belt 11 is removed from the drive shaft 15a by moving along the drive shaft 15a.

  When the replacement or maintenance of each member is completed, the separation belt 11 is inserted into the drive shaft 15a and moved along the drive shaft 15a to the drive roller 15 side. The notch 52a is moved closer to the drive roller 15 side against the urging force, and then separated from the drive roller 15 in the notch 52a by the urging force of the spring 20, and the tension of the separation belt 11 is applied. By doing so, the separation belt 11 is attached.

  When the feeding roller 10 is attached, the drive gear 55 that engages the notch 17a with the drive shaft 15a is engaged with the idler gear 56. The guide plates 53 and 54 are attached by inserting the drive shaft 15a into the shaft holes 53a and 54a. At this time, since the feeding roller 10, the separation belt 11, and the guide plates 53 and 54 are unitized together with the drive shaft 15a, the unit is attached to the frame by engaging the drive shaft 15a with the engagement groove of the frame of the ADF 51 body. Attached to.

  As described above, in the present embodiment, the separation belt 11 and the guide plates 53 and 54 are attached to the drive shaft 15a and the feeding roller 10 is connected to the drive gear 55, the idler gear 56, the belt gears 57 and 58, and the belt 59 via the drive force transmission member. Since the drive shaft 15a is attached to and detached from the ADF 51 body, the guide plates 53 and 54, the feeding roller 10 and the separation belt 11 can be unitized together with the drive shaft 15a. 54, the feeding roller 10 and the separation belt 11 can be easily attached and detached. As a result, the workability of the replacement and maintenance work of these members can be greatly improved.

  Further, since the feeding roller 10 is held together with the driving force transmission member by the feeding roller holder 17, and the feeding roller holder 17 is detachable from the drive shaft 15a, the unitized guide plates 53 and 54, the feeding roller 10 and the separation are separated. When the belt 11 is removed from the ADF 51 main body, both the feeding roller 10 and the driving force transmission member can be attached to and detached from the drive shaft 15a, and the workability of replacement and maintenance work of the feeding roller 10 is greatly improved. Can do.

  Further, the driven roller 16 is moved toward or away from the driving roller 15 against the urging force of the spring 20, thereby applying or releasing the tension of the separating belt 11 so that the separating belt 11 can be attached to and detached from the driving shaft 15a. Therefore, when the unitized guide plates 53 and 54, the feeding roller 10 and the separation belt 11 are removed from the ADF 51 body, the separation belt 11 can be detached from the drive shaft 15a, and the separation belt 11 can be replaced. In addition, the workability of maintenance work can be greatly improved.

  In the present embodiment, the guide plates 53 and 54 are detachably attached to the drive shaft 15a. However, the guide plates 53 and 54 are supported by support means different from the drive shaft 15a. May be. In this case, at least the feeding roller holder 17 having the feeding roller 10 and the separation belt 11 having the above-described configuration may be detachably attached to the drive shaft 15a. Even in this case, when the unitized feeding roller 10 and the separation belt 11 are removed from the ADF 51 main body, the feeding roller 10 and the driving force transmission member, or the separation belt 11 are independently attached to the drive shaft 15a. It is possible to detach, and the workability of replacement and maintenance work of the feeding roller 10 or the separation belt 11 can be greatly improved.

Next, features of the present invention will be described.
Since the elevating member 2 is rotatably supported by the drive shaft 15a when assembled to the drive shaft 15a, the elevating member 2 may be erroneously assembled to the drive shaft 15a in a posture different from the normal posture. When the drive shaft 15a is attached to the apparatus main body while the lifting member 2 remains in a posture different from the normal posture, the lifting member 2 is damaged or the feeding roller holder 17 cannot be lifted up and down properly. A document feeding failure due to the roller 10 may occur.

  In this embodiment, as shown in FIGS. 14 and 15, a protrusion-shaped protrusion 1 a which is a fitted portion is provided on the side surface of the feeding roller holder 17, and a long-hole-shaped fitting portion into which the protrusion 1 a is fitted. 2 a is provided on the elevating member 2. The elevating member 2 may be provided with the protruding portion 1a, and the feeding roller holder 17 may be provided with the fitting portion 2a. When the feeding roller holder 17 and the elevating member 2 are assembled to the drive shaft 15a, the protruding roller 1a and the fitting portion 2a are fitted as shown in FIG. The pivotable range of the elevating member 2 with respect to the holder 17 is restricted. Thus, the elevating member 2 is assembled to the drive shaft 15a in the normal posture based on the posture of the feeding roller holder 17 so that the posture of the elevating member 2 takes a normal posture for raising and lowering the feeding roller holder 17. It is possible to suppress the member 2 from being mistakenly assembled to the drive shaft 15a. Therefore, the drive shaft 15a is attached to the apparatus main body while the elevating member 2 remains in a posture different from the normal posture, and the elevating member 2 is damaged or a document feeding failure due to the feeding roller 10 occurs. Can be suppressed.

  The protrusion 1a and the fitting portion 2a are fitted to each other, and the feeding roller holder 17 and the lifting member 2 are assembled to the drive shaft 15a, whereby the feeding roller holder 17 is lifted and lowered in conjunction with the rotation of the lifting member 2. It is possible. That is, by rotating the elevating member 2 upward about the drive shaft 15a by an eccentric cam (not shown), the protrusion 1a contacts the upper inner wall surface of the fitting portion 2a, and the elevating member 2 is rotated. In conjunction with this, the feeding roller holder 17 can be raised around the drive shaft 15a. On the other hand, by rotating the elevating member 2 downward about the drive shaft 15a by the eccentric cam, the projecting portion 1a contacts the lower inner wall surface of the fitting portion 2a and interlocks with the rotation of the elevating member 2. Thus, the feeding roller holder 17 can be lowered around the drive shaft 15a.

  As described above, in the present embodiment, the protrusion 1a and the fitting are provided in a mechanism that prevents the lifting member 2 from being mistakenly assembled to the drive shaft 15a and a mechanism that lifts and lowers the feeding roller holder 17 by the lifting member 2. By also using the part 2a, the device configuration can be simplified, and the size and cost of the device can be reduced.

  Moreover, by making the fitting part 2a provided in the raising / lowering member 2 into a long hole shape, as shown in FIG. 16, the clearance gap in which the protrusion part 1a can move to the longitudinal direction of a long hole shape is in the fitting part 2a. It is formed. Accordingly, when the feeding roller holder 17 is attached to and detached from the drive shaft 15a, even if the feeding roller holder 17 is tilted with respect to the elevating member 2 as shown in FIG. The projecting portion 1a moves in the longitudinal direction and the projecting portion 1a and the fitting portion 2a do not interfere with each other so that the feeding roller holder 17 can be easily attached and detached.

  In particular, even when the guide plate 53 is attached to the drive shaft 15a, the feed roller holder 17 is tilted so that the feed roller holder 17 and the guide plate 53 do not interfere with each other, and the feed roller holder 17 is moved to the drive shaft 15a. Detachable. Therefore, it is possible to omit the work of removing the guide plate 53 from the drive shaft 15a when exchanging and maintaining the feeding roller 10 and the separation belt 11, and accordingly, the workability of the exchanging work and the maintenance work is correspondingly reduced. Can be improved.

  Further, after the replacement work and the maintenance work are finished, after attaching various members removed from the drive shaft 15a to the drive shaft 15a, the drive shaft 15a is rotatably supported by the drive shaft 15a when mounted on the apparatus main body. In some cases, the guide plate 53 may be in a posture different from the normal posture, for example, by reversing. In this case, if the drive shaft 15a is attached to the apparatus main body while the guide plate 53 is in a posture different from the normal posture, the guide plate 53 may be damaged or a conveyance failure may occur.

  In the present embodiment, as shown in FIG. 18, the protrusion 3a provided on the guide plate 53 and the turning trajectory that the protrusion 3a can pass through when the guide plate 53 is rotated with respect to the drive shaft 15a. The rotation restricting portion 5 for restricting the movable range of the guide plate 53 is provided with the interference portion 4a provided on the axial movement restricting member 4 so as to be located within the predetermined range. If the guide plate 53 is not properly assembled with the drive shaft 15a so as to be in a proper posture, the rotation restricting portion 5 and the projection portion 3a of the guide plate 53a and the interference portion 4a of the axial movement restricting member 4 Interfere with each other, and the axial movement restricting member 4 cannot be properly mounted. As described above, since the axial direction movement restricting member 4 cannot be properly mounted, it is possible to make the operator aware that the guide plate 53 is in a posture different from the normal posture, thereby suppressing misassembly. be able to. Therefore, it is possible to prevent the drive shaft 15a from being attached to the apparatus main body while the guide plate 53 remains in a posture different from the normal posture, and the guide plate 53 can be prevented from being damaged or having a conveyance failure.

  Here, depending on the hardness of the axial movement restricting member 4, as shown in FIG. 19, even if the guide plate 53 is in a posture different from the normal posture, the guide plate is deformed by the deformation of the axial movement restricting member 4. There is a possibility that the interference portion 4 a provided on the axial movement restricting member 4 gets over the protruding portion 3 a provided on 53 and the axial movement restricting member 4 can be mounted on the feeding roller holder 17.

  Therefore, as shown in FIG. 20, the guide plate 53 is provided with a protruding portion 3 b having such a size that the interference portion 4 a cannot get over even if the axial movement restricting member 4 is deformed. As a result, when the guide plate 53 is in a posture different from the normal posture, the protrusion 3 b of the guide plate 53 interferes with the interference portion 4 a of the axial movement restricting member 4, and the axial direction relative to the feeding roller holder 17. The movement restricting member 4 is lifted and the axial movement restricting member 4 cannot be properly mounted. Therefore, since the axial movement restricting member 4 cannot be properly attached to the feeding roller holder 17 in this way, it is possible to make the operator aware that the guide plate 53 is in a posture different from the normal posture. , Misconfiguration can be suppressed.

  Further, when the axial direction movement restricting member 4 is excellent in flexibility, the guide plate 53 has a posture different from the normal posture, and the protrusion 3 a of the guide plate 53 and the axial direction movement restricting member 4 Even in the state of interference with the interference portion 4a, the axial movement restricting member 4 may be attached to the feeding roller holder 17 while being twisted so as to move in the surface direction of the side surface of the feeding roller holder 17.

  Therefore, as shown in FIGS. 21 and 22, the axial movement restriction member is brought into contact with the projection 1 b provided to protrude from the side surface of the feeding roller holder 17 and the axial movement restriction member 4 in the surface direction of the side face. By preventing 4 from moving in the surface direction, torsion of the axial movement restricting member 4 is restricted. As a result, the guide plate 53 is in a posture different from the normal posture, and the axial movement restricting member 4 is screwed in a state where the protrusion 3a of the guide plate 53 interferes with the interference portion 4a of the axial movement restricting member 4. It is possible to suppress mounting on the feeding roller holder 17 while being carried out. Therefore, as shown in FIG. 23, the axial movement restricting member 4 is mounted on the feeding roller holder 17 without being twisted, so that the movement of the feeding roller holder 17 in the drive shaft axis direction can be appropriately restricted, and the guide plate 53 is properly regulated. Can be assembled to the main body of the device.

What has been described above is merely an example, and the present invention has a specific effect for each of the following modes.
(Aspect A)
A document placing table on which a bundle of documents composed of a plurality of documents can be placed, a rotary shaft member that is detachably provided on the apparatus main body and rotated by a rotational driving force transmitted from a drive source, and a drive transmission member on the rotary shaft member. And a feeding member that feeds the document in contact with the topmost document on the document stack placed on the document placing table, and a document bundle that is attached to the rotary shaft member and fed by the feeding member. separating means for separating from the document stack one by one document the uppermost, the mounting et been rotatably to the rotating shaft member, to hold the feed member together with the driving force transmitting member, relative to the rotary shaft member A detachable holding member, and an elevating member that is rotatably attached to the rotating shaft member, and that moves the holding member up and down in conjunction with its rotation so that the feeding member contacts and separates from the document. , Said times Pivotally attached to the shaft member, in the document feeder and a guide member for guiding the conveyance of the document, the orientation of the elevation member, a predetermined set in advance based on the posture of the holding member Elevating and lowering member posture regulating means for regulating the posture, and guide member posture regulating means for regulating the posture of the guide member to a predetermined posture set in advance based on the posture of the holding member . According to this, as described in the above embodiment, it is possible to prevent the lifting member and the guide member, which are rotating members attached to the rotating shaft member so as to be rotatable , from being misassembled into the apparatus main body.
(Aspect B)
(Aspect A), the lift member position regulating means, to take a normal position which the posture of the upper SL lifting member is capable of lifting the holding member, the elevating member with respect to the orientation of the holding member orientation you regulate. According to this, as will be described with respect to the above-described embodiment, it is possible to prevent the lifting member from being assembled in a posture different from the normal posture.
(Aspect C)
In (Aspect B), the elevating member posture regulating means has a fitting portion provided in one of the elevating member and the holding member, and a fitted portion provided in the other and fitted into the fitting portion. . According to this, as described in the above embodiment, the pivotable range of the elevating member is limited, and it is possible to suppress the posture of the elevating member being assembled in a posture different from the normal posture.
(Aspect D)
In (Aspect C), the fitting portion has a long hole shape, and the fitted portion has a protruding shape. According to this, as described in the above embodiment, the holding member can be easily attached to and detached from the rotating shaft member.
(Aspect E)
(Embodiment A), (Aspect B), (embodiment C) or (embodiment D), the upper Symbol guide member position regulating means takes the normal posture posture of the upper Symbol guide member can guide the feeding of the document as such, it regulates the attitude of the guide member with respect to the orientation of the holding member. According to this, as described in the above embodiment, it is possible to prevent the guide member from being assembled in a posture different from the normal posture.
(Aspect F)
In (Embodiment E), a movement restricting member for restricting the movement of the holding member in the axial direction of the rotating shaft member is provided on the rotating shaft member, and a guide for restricting a rotatable range of the guide member as a guide member posture restricting means. The member rotation restricting portion is provided on the movement restricting member. According to this, as described in the above embodiment, the guide member rotation restricting portion provided in the movement restricting member limits the pivotable range of the guide member, and the guide member has a posture different from the normal posture. It can suppress being assembled in the posture.
(Aspect G)
In (Aspect F), the movement restricting member is long in the axial direction of the rotating shaft member, and has a twist restricting means for restricting torsion of the movement restricting member. According to this, as described in the above embodiment, it is possible to suppress the movement restricting member from being mounted while being twisted.
(Aspect H)
Document reading means for reading an image of the document while exposing the document, and passing the document placed on the document placing portion toward the transport destination through a reading position by the document reading means. In an image reading apparatus including an original conveying unit that causes the original reading unit to read an image, (Aspect A), (Aspect B), (Aspect C), (Aspect D), and (Aspect E) are used as the original conveying means. , (Aspect F) or (Aspect G) is used. According to this, good image reading can be performed.
(Aspect I)
An image forming unit that forms an image on a recording material and an image reading unit that reads an image of the original while conveying the original, and at least an image read by the image reading unit is formed on the recording material by the image forming unit. In the image forming apparatus, the image reading apparatus of (Aspect H) is used as the image reading unit. According to this, good image formation can be performed.

DESCRIPTION OF SYMBOLS 1a Protrusion part 1b Protrusion part 2 Elevating member 2a Fitting part 3a Protrusion part 3b Protrusion part 4 Axial movement restriction member 4 Interference part 5 Rotation restriction part 6 Feeding roller cover 7 Reflecting plate 8 Hinge 9 Document placement table 10 Feeding roller 11 Separation belt DESCRIPTION OF SYMBOLS 12 Separation prevention roller 13 Stopper member 14 Pressure plate 15 Drive roller 15a Drive shaft 16 Drive roller 16a Shaft part 17 Feeding roller holder 17a Notch part 18 Paper feed part case 19 Supporting point 20 Spring 21 One-way clutch 22 Static elimination lamp 23 Conveyance roller 24 Driven Roller 25 Reverse path 26 Lever 27 Spring 28 Reverse guide 29 Reversed discharge guide 30 Paper discharge path 31 Reflection guide plate 32 Transport roller 33 Driven roller 34 Paper discharge roller 35 Driven roller 36 Static elimination brush 37 Exterior cover 38 Pressure plate 39 Support point 40 Main Frame 41 link 42 the auxiliary frame 42a guide plate 43 pivot 44 the magnet 46 handle 47 stopper 48 driven roller 50 the image reading unit 51 an automatic document feeder (ADF)
52 Belt holder 52a Notch 53 Guide plate 53a Shaft hole 54 Guide plate 54a Shaft hole 55 Drive gear 56 Idler gear 57 Belt gear 58 Belt gear 59 Belt 60 Spring 61 Ring 62 Engaging member 63 Cylindrical member 70 Process unit 74 Photoconductor 75 Charging Device 80 Developing device 81 Developing unit 82 Developing sleeve 83 Magnet roller 84 Doctor blade 85 Stirring unit 86 Conveying screw 87 Developing case 88 Toner concentration sensor 90 Drum cleaning device 91 Cleaning blade 92 Fur brush 93 Electric field roller 94 Scraper 95 Recovered screw 96 Recycled toner Conveying device 100 Image forming unit 124 Transfer unit 125 Intermediate transfer belt 126 Primary transfer roller 127 Secondary transfer counter roller 128 Paper transport Feed unit 129 Paper transport belt 130 Drive roller 131 Secondary transfer roller 132 Belt cleaning device 133 Registration roller pair 134 Fixing device 135 Paper discharge roller pair 136 Transfer paper reversing device 137 Main body side transfer paper feed path 140 Paper feed device 141 Paper bank 142 paper feed cassette 143 delivery roller 144 paper feed path 145 separation roller 146 transport roller 150 scanner 152 slit glass 153 contact glass 154 exposure lamp 155 mirror 200 optical writing device 500 copier 501 paper discharge tray

Japanese Patent No. 3694012

Claims (9)

A document table on which a stack of documents composed of a plurality of documents can be placed;
A rotating shaft member that is detachably provided in the apparatus main body and rotates by a rotational driving force transmitted from a driving source;
A feeding member attached to the rotating shaft member via a drive transmission member, and feeding out and coming into contact with the uppermost document of the document bundle placed on the document placing table;
Separating means attached to the rotary shaft member and separating a plurality of documents fed by the feeding member into one sheet;
Said mounting et been rotatably to the rotating shaft member, to hold the feed member together with the driving force transmitting member, a holding member detachably attached to the rotating shaft member,
An elevating member that is pivotally attached to the rotating shaft member, and that moves the holding member up and down in conjunction with its rotation so that the feeding member contacts and separates from the document;
In the document conveying apparatus provided with a guide member that is rotatably attached to the rotating shaft member and guides conveyance of the document,
A lifting member position regulating means for regulating the posture of the elevation member, to a predetermined position set in advance based on the attitude of the holding member,
An original conveying apparatus, comprising: a guide member attitude regulating unit that regulates the attitude of the guide member to a predetermined attitude set in advance based on the attitude of the holding member . The document conveying device according to claim 1.
The lifting member position regulating means, to take a normal position which the posture of the upper SL lifting member is capable of lifting the holding member, and Turkey to regulate the attitude of the elevating member with respect to the orientation of the holding member An original conveying apparatus characterized by the above. The document conveying device according to claim 2.
The elevating member attitude regulating means has a fitting portion provided in one of the elevating member and the holding member, and a fitted portion provided in the other and fitted into the fitting portion. Document transport device. The document feeder according to claim 3.
The document conveying apparatus, wherein the fitting portion has a long hole shape, and the fitting portion has a protruding shape. The document feeder according to claim 1, 2, 3 or 4,
Upper Symbol guide member position regulating means, to take a normal position which the posture of the upper Symbol guide member can guide the feeding of the document, it regulates the attitude of the guide member with respect to the orientation of the holding member document feeder which is characterized a call. The document feeder according to claim 5, wherein
A movement restricting member for restricting movement of the holding member in the axial direction of the rotating shaft member is provided on the rotating shaft member,
The document conveying apparatus according to claim 1, wherein a guide member rotation restricting portion for restricting a rotatable range of the guide member is provided in the movement restricting member as the guide member posture restricting means. The document feeder according to claim 6.
The document conveying apparatus according to claim 1, wherein the movement restricting member is elongated in a drive shaft direction, and has a twist restricting means for restricting torsion of the movement restricting member. Document reading means for reading an image of the document while exposing the document;
An image is provided with an original conveying unit that causes the original reading unit to read an image of the original through a reading position by the original reading unit in the middle of conveying the original placed on the original placing unit toward the destination. In the reading device,
An image reading apparatus using the original conveying apparatus according to claim 1, 2, 3, 4, 5, 6, or 7 as the original conveying means. Image forming means for forming an image on a recording material;
Image reading means for reading an image of the original while conveying the original,
In an image forming apparatus for forming at least an image read by the image reading unit on the recording material by the image forming unit,
An image forming apparatus using the image reading apparatus according to claim 8 as the image reading unit.

Images